253605512634 has 16 divisors (see below), whose sum is σ = 508138291488. Its totient is φ = 84380626512.

The previous prime is 253605512579. The next prime is 253605512647. The reversal of 253605512634 is 436215506352.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38632537 + ... + 38639100.

It is an arithmetic number, because the mean of its divisors is an integer number (31758643218).

Almost surely, 2^253605512634 is an apocalyptic number.

253605512634 is an abundant number, since it is smaller than the sum of its proper divisors (254532778854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253605512634 is a wasteful number, since it uses less digits than its factorization.

253605512634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77272189.

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 253605512634 in words is "two hundred fifty-three billion, six hundred five million, five hundred twelve thousand, six hundred thirty-four".